Patent US2679383A successfully refreshed from Google Patents.
US2679383A
Expired / Lapsed
US
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Wall scraper for deep wells
Assignee: Regan Forge and Engineering Co
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Filing: 1950-10-23
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Granted: 1954-05-25
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Expires: 1970-10-23
Abstract
No abstract record available.
Inventors
- 👤 Marion A Garrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:22
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/26; E21B10/32; E21B10/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR407051A
Cited
US1483611A
Cited
US1604200A
Cited
US1611282A
Cited
US2116898A
Cited
US2457628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |